Bash Script Skeleton

A skeleton file for a basic bash script.

#!/usr/bin/env bash

#
# A basic bash script stub.
#
usage() {
    echo "output usage instructions here"
    echo
}

version() {
    echo "output version info here."
    echo
}

main() {
    if [ "$#" -lt 1 ]; then
        usage; exit 1
    fi

    local subcommand="$1"; shift

    case $subcommand in
        "-h"|"--help")
            usage; exit 0
            ;;
        "-v"|"--version")
            version; exit 0
            ;;
    esac


    # Here are two different ways to get the script directory.
    local workingdir="$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")"
    echo $workingdir

    local startdir="${BASH_SOURCE%/*}"
    if [[ ! -d "$startdir" ]]; then "$startdir=$(pwd)"; fi
    echo $startdir

    # And this will get you the fullpath to a script, MOST of the time
    # See https://sittinginoblivion.com/wiki/get-path-currently-executing-bash-script
    local fullpath="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
    echo $fullpath

    exit 0
}

main "$@"